1 86 MINUTE MARVELS OF NATURE 



still more highly magnified they are found to be 

 serrated like a saw on its cutting edge, the teeth 

 being far too delicate to photograph for repro- 

 duction. The mandibles or lancets make the 



Fig. 121. Magnified tin of one of the gad-fly's lancets 



puncture ; the two maxillce or blood-sucking 

 organs on either side feel their way into the 

 puncture and produce a larger flow of blood. As 

 showing how perfectly adapted these organs are 

 for this purpose I have reproduced in Fig. 122 

 the tip of one of these also on a larger scale. 



